Communication switching system network control arrangement

ABSTRACT

A network control arrangement for a communication switching system having a group of switching network units each having a plurality of inlets and a plurality of outlets and having a plurality of switching devices for closing paths coupling inlets and outlets, each one of the devices having control elements for causing the paths to be closed when energized in response to common control equipment for causing selectively the activation of the control elements to establish paths through the network units, includes a circuit coupling together corresponding ones of the control elements of the network units so that corresponding ones of the control elements can be energized simultaneously, a distributor for selecting one of the control elements to permit it to be activated, and a switching circuit for coupling selectively each one of the control elements of a selected network unit to the distributor so that it can permit the selected control element to be activated.

United States Patent 1 1 Athas et a1.

1 1 Nov. 25, 1975 1 1 COMMUNICATION SWITCHING SYSTEM NETWORK CONTROL ARRANGEMENT [75] Inventors: Gregory R. Athas, Hanover Park;

Johannes Draayer, Wheaton; William F. Maltese, Medinah; Nigel .I. E. Reynolds, Elk Grove Village; George W. Potenza, Western Springs, 1111 of 111,

[73] Assignee: GTE Automatic Electric Laboratories Incorporated, Northlake, 111.

[22] Filed: Sept. 14, 1973 [21] Appl. No: 397,453

[52] US. Cl. 179/18 GE [51] Int. Cl. H04Q 3/42 [58] Field of Search... 179/18 (3121752 D,175.21,

PlETIORK CONTROLLER 135 ANN DECODE 3,660,600 5/1972 Lee, Jr, 179/18 EA 3,748,390 7/1973 Gueldenpfennig et a1. 179/18 GE 3,829,627 8/1974 Short et a1. 179/1752 Primary ExaminerThomas W, Brown [57] ABSTRACT A network control arrangement for a communication switching system having a group of switching network units each having a plurality of inlets and a plurality of outlets and having a plurality of switching devices for closing paths coupling inlets and outlets, each one of the devices having control elements for causing the paths to be closed when energized in response to common control equipment for causing selectively the activation of the control elements to establish paths through the network units, includes a circuit coupling together corresponding ones of the control elements of the network units so that corresponding ones of the control elements can be energized simultaneously, a distributor for selecting one of the control elements to permit it to be activated, and a switching circuit for coupling selectively each one of the control elements of a selected network unit to the distributor so that it can permit the selected control element to be acti vated.

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1. In a communication switching system having a group of switching network units, each unit comprising at least two crosspoint matrix stages coupled by links, each network unit having a plurality of inlets and a plurality of outlets and having a plurality of switching devices for closing paths coupling inlets and outlets, each one of the devices having control means energizable for causing the paths to be closed, common control equipment for causing selectively the activation of said control means to establish paths through said network units, a network control arrangement comprising: means coupling together corresponding ones of said control means of said matrix stages so that said corresponding ones of said control means can be energized simultaneously; distributing means for selecting one of said control means to permit it to be activated; and switching means for coupling selectively each one of the control means of a selected network unit to said distributing means so that said distributing means can permit the selected control means to be activated; testing means for checking selected switching devices; sequence check control means coupled to said network units; variable sequence translation means coupled to said network unit means; whereby said testing means may be operated in any sequence and any device may be operated and checked in any desired order, at any time, said testing means comprising; hold path release verification means comprising, hold path link test sensors coupled between each of said matrix stages; test voltage insertion means coupled between each of said matrix stages; and hold path link test sensor verification means coupled between each of said matrix stages; simultaneous mark and link test control means comprising, mark means coupled to each of said control means; link test means coupled between each of said switching matrix stages; mark and link test sensor means coupled to said mark means and said link test means; and sensor verification gate means coupled to said mark means and said link test means; circuit pull verification means coupled to each of said matrix stages comprising, pull test sensor means coupled to said circuit pull verification means; and sensor verification gate means coupled to said circuit pull verification means. 